Ornith-1.5-122B (AutoRound Mixed-Precision W3W4-50GB)

This repository provides an optimized mixed-precision quantization of ornith-ai/Ornith-1.5-122B created with Intel AutoRound.

The model is quantized specifically to fit within 50.8 GB of GPU VRAM, allowing it to run comfortably on a single 64 GB GPU (such as NVIDIA CMP 170HX / RTX 6000 Ada / A100 80GB / H100) with ample headroom (~13.2 GB) for full 262,144 token context inference.


Quantization Architecture & Precision Breakdown

Subsystem Layers Precision Execution Kernel Footprint
Outer MoE Blocks 12 Blocks (0–5 & 42–47) W4A16 (group 128, sym) Marlin Tensor Cores ~14.4 GB
Middle MoE Blocks 36 Blocks (6–41) W3A16 (group 128, sym) Marlin / Humming ~32.4 GB
Attention & DeltaNet All 48 Blocks W8A16 (group 128, sym) Marlin Tensor Cores ~4.5 GB
Routers & Shared Experts All Blocks BF16 (Preserved) Native BF16 ~1.2 GB
  • Active Parameters: ~10 Billion per token (Top-8 routed experts + shared experts) out of 122 Billion total.
  • Calibrated on: 128 authentic long-context technical documents (4096 tokens each) using AutoRound.
  • Vision Tower: Stripped for dedicated, high-throughput text causal generation (Qwen3_5MoeForCausalLM).

Serving with vLLM

To serve this model with vLLM:

vllm serve Beling86/Ornith-1.5-122B-AutoRound-W3W4 \
  --dtype bfloat16 \
  --max-model-len 262144 \
  --max-num-batched-tokens 4096 \
  --enable-prefix-caching \
  --enable-chunked-prefill \
  --gpu-memory-utilization 0.95
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